Question: Which taxon has the biggest/largest genome size?
Paraphrase: What is the taxon with the biggest/largest genome size?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q16521 . ?ent wdt:P2143 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: Triticum aestivum